Machine for punching and forming nuts



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MAGHINE FOR PUNGHING AND FORMING NUTS- I WMJ, x

am STATES PATENT OFFICE.

\VILLIAM H. PAIGE, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR OF ONE- HALFTO ALLEN MIDDLETON, OF PHILADELPHIA, PENNSYLVANIA.

MACHINE FOR PUNCHING AND FORMING NUTS.

SPECIFICATION forming part of Letters Patent No. 272,083, dated February13, 1883.

Application filed February 20, 1882.

To all whom it may concern Be it known that I, WILLIAM H. PAIGE, ofSpringfield, in the county of Hampdenand State of Massachusetts, haveinvented a new and useful Improvement in Machinery -for Forming Nuts, ofwhich the following is a specification and description.

The object ofmy invention is to provide a machine for 'formingnuts,punching the hole to be threaded, and forming the sectional flangeorfillet for locking the nut upon the bolt; and I accomplish this bythemechanism substantially as hereinafter described,andillustrated inthe accompanying drawings,- in

- which-- Figure I is a front view of a machine made according to myinvention. Fig. IIis a vertical section of the same at line A of Fig.*I.Fig; III is a plan view of the die, having sectional recessescollectively of a general circular form in its upper face to form acorresponding sectional flange or fillet of general circular form on theface of the nut around the hole to be tapped out. Fig. IV is a plan viewof a die having sectional recesses collectively ofa spiral or eccentricform in its upper face around the central perforation to form acorresponding sectional flange or fillet of a general spiral oreccentric form on the face of the nut and around the hole to bethreaded. Fig. V is a transverse-vertical section of the die on line Bof Fig. IV. Fig. VI is a modification ofthe follower, showing the samemadein two parts vertically; and Fig. VII is a plan view of the 5 lowerface of said modification of follower.

In the drawings, 1 represents the bed of the machine, upon or in whichis firmly secured the die, as 4, having a hole, as 9, extending downthrough it to the vertical opening, as 10,

4.0 in the bed of the machine. In the upper face of the die, as 4, Iform recesses, as 5, around the hole 9, leaving portions of the die, asat 20, between these recesses, with their upper face on substantiallythe same horizontal plane 5 as the face of the die, as shown clearly inFigs. 1V and V, and the outer walls 0 f these recesses are beveled orinclined with reference to the upper face of the die, and I prefer thatthe end walls of these recesses shall be beveled or inclined also,asshown clearly in Figs. IV and ,V, as that construction will cause theparts, as 20, of the die to wear much longer. To give a hole 9 in thedie.

(No model.)

betterfinish to the sectional flange on the nut I prefer that therecesses, as 5, should extend down to a well-defined shoulder, as at 18,and the hole, as 9, through the die may be larger in diameter at thebottom than at the top to give sufficient clearance.

The plunger, as 3, is adapted to move vertically in its socket or guide,as 2, and the punch. as 8, which may be slightly reduced in diameter atthe lower end, is secured in the plunger by a key, or in any desiredmanner, and a follower, as 6, is provided with a vertical hole, throughwhich the punch 8 will move freely, and a yoke, as 7, is firmly securedto the follower, each end of said yoke being adapted to move freely inavertical direction in a vertical guide, as ll, secured to the bed of themachine. 0

An elbow, as 15, is pivoted,vas at 16, in the upper end of eachverticalguide 11, and in a position directly above the yoke 7, and abar, as 13, is secured to the plunger 3, to each end of which bar ispivoted a rod, as 14, slotted at its lower end, with a pin, as 17,extending through said slot and secured in the elbow at a point abovethe pivot 16 and a little outside of a vertical line extending throughthe latter.

A spring of any desired form,as 12, is placed beneath the yoke 7,between it and the bed of the machine, to keep the yoke in its mostelevated position when not forced down by the plunger.

The operation of the machine is as follows: 8 Atnut of any desired formis placed on the die 4, as shown in dotted lines in Figs. I and II, and,power being applied to the machine, the plunger being forced down, theaxes of the punch 8 and of the die 4 being coincident, the 0 punch cutsa hole through the nut, forcing the metal taken from the nut downthrough the In this operation themetal, in being moved downward, isforced outward also between the bottom of the nut and the 5 top of thedie, and this metal is forced into, completely fills, and takes the formof these recesses 5, and thus forms the sectional flange on the lowerface of the nut, and the surplus metal is forced down through theopening9 mo.

and through the bed of the machine. As soon as the punch has made thehole in the metal the follower has reached the upper face of the nut,and the concave lower face of the follower is forced down upon and givesa convex form to the upper face of the nut, and also forcing the nutdown upon the die, while the punch is still within the hole it made inthe nut. The metal at the recesses 5 is forced thereinto, and is madedense and firm. When the follower has moved nearly down to the nut theyoke 7 has moved down also sufficiently to permit the lower arms of theelbows to drop in above and upon the ends of the yoke. When the plungermoves up it carries with it the punch also, which moves up through thefollower, while the latter remains in its position upon the nut, beingheld in that position by the elbows bearing upon the ends of the yoke,the

- follower thus forcing the nut 0E the punch until the plunger moveshigh enough to cause the slotted ends of the rods 14. to engage againstthe studs or pins 17, and, as the plunger moves up, pull thelower armsof the elbows outfrom their position upon the yoke. When this occurs theelasticity of the springs 12 quickly forces up the yoke to its mostelevated position, and the machine is ready for the same operation uponanother nut.

Instead of making the follower, as 6, solid, I may make itdivided in avertical direction, as shown in Figs. V1 and VII, so that should thepunch 8 become upset and move hard in the follower the yoke might beremoved from the follower and the two parts of the latter removed fromthe punch, and the latter repaired or a new one inserted in place in theplunger.

It is evident that the elbows 15 may be made of any other convenient ordesirable form-as, for example, they may be made in the form ofecceutricsand for convenience 1 denominate these parts 15 cams orlatches,inasmuch as each performs the function of a cam.

It is evident that the slotted rods 14 may be connected with the plunger3 in anyother manner than through the medium of the crosspiece 13, andthey may be also made adjustable as to their length either by a socketand screw-thread joint or in any other convenient manner.

The die, as 4, having the recesses, as 5, th erein. may be used in anyordinary punch-machine, and without the follower, yoke, cams,

ing the yoke and follower in a stationary position while the punch iswithdrawn from the nut, and rods connecting the plunger with said camsor latches to release the yoke during the upward movement of theplunger, substantially asdescribed.

2. The combination, in a nut-punching machine, of a die having a beveledsectional recess around its central hole, and a punch for punching thehole in said nut and forcing the metal of the blank into said sectionalrecessvto form a beveled sectional flange or fillet on the face of anut, substantially as described.

\VILLIAM H. PAIGE.

Witnesses:

T. A. CURTIS, OHAs. H. WOOD.

